GWL_FCS30: a global 30 m wetland map with a fine classification system using multi-sourced and time-series remote sensing imagery in 2020 DOI Creative Commons
Xiao Zhang,

Liangyun Liu,

Tingting Zhao

et al.

Earth system science data, Journal Year: 2023, Volume and Issue: 15(1), P. 265 - 293

Published: Jan. 17, 2023

Abstract. Wetlands, often called the “kidneys of earth”, play an important role in maintaining ecological balance, conserving water resources, replenishing groundwater and controlling soil erosion. Wetland mapping is very challenging because its complicated temporal dynamics large spatial spectral heterogeneity. An accurate global 30 m wetland dataset that can simultaneously cover inland coastal zones lacking. This study proposes a novel method for by combining automatic sample extraction method, existing multi-sourced products, satellite time-series images stratified classification strategy. approach allowed generation first map with fine system (GWL_FCS30), including five sub-categories (permanent water, swamp, marsh, flooded flat saline) three tidal (mangrove, salt marsh flats), which was developed using Google Earth Engine platform. We combined expert knowledge, training refinement rules visual interpretation to generate geographically distributed samples. Second, we integrated Landsat reflectance products Sentinel-1 synthetic aperture radar (SAR) imagery various water-level phenological information capture heterogeneity wetlands. Third, applied strategy local adaptive random forest models produce at each 5∘×5∘geographical tile 2020. Lastly, GWL_FCS30, mosaicked 961 5∘×5∘ regional maps, validated 25 708 validation samples, achieved overall accuracy 86.44 % kappa coefficient 0.822. The cross-comparisons other demonstrated GWL_FCS30 performed better capturing patterns wetlands had significant advantages over diversity sub-categories. statistical analysis showed area reached 6.38 million km2, 6.03 km2 0.35 wetlands, approximately 72.96 were poleward 40∘ N. Therefore, conclude proposed suitable large-area product has potential provide vital support management. 2020 freely available https://doi.org/10.5281/zenodo.7340516 (Liu et al., 2022).

Language: Английский

The global distribution and trajectory of tidal flats DOI
Nicholas Murray, Stuart Phinn, Michael DeWitt

et al.

Nature, Journal Year: 2018, Volume and Issue: 565(7738), P. 222 - 225

Published: Dec. 19, 2018

Language: Английский

Citations

801
Global declines in human‐driven mangrove loss DOI Creative Commons
Liza Goldberg, David Lagomasino, Nathan Thomas

et al.

Global Change Biology, Journal Year: 2020, Volume and Issue: 26(10), P. 5844 - 5855

Published: July 12, 2020

Global mangrove loss has been attributed primarily to human activity. Anthropogenic hotspots across Southeast Asia and around the world have characterized ecosystem as highly threatened, though natural processes such erosion can also play a significant role in forest vulnerability. However, extent of threats not fully quantified at global scale. Here, using Random Forest-based analysis over one million Landsat images, we present first 30 m resolution maps drivers from 2000 2016, capturing both human-driven stressors. We estimate that 62% losses between 2016 resulted land-use change, through conversion aquaculture agriculture. Up 80% these occurred within six Asian nations, reflecting regional emphasis on enhancing for export support economic development. Both anthropogenic declined slower declines caused an increase their relative contribution total area. attribute decline regionally dependent combination increased conservation efforts lack remaining mangroves viable conversion. While restore protect appear be effective decadal timescales, emergence presents immediate challenge coastal adaptation. anticipate our results will inform decision-making restoration initiatives by providing locally relevant understanding causes loss.

Language: Английский

Citations

727
The State of the World's Mangrove Forests: Past, Present, and Future DOI Open Access
Daniel A. Friess, Kerrylee Rogers, Catherine E. Lovelock

et al.

Annual Review of Environment and Resources, Journal Year: 2019, Volume and Issue: 44(1), P. 89 - 115

Published: Aug. 10, 2019

Intertidal mangrove forests are a dynamic ecosystem experiencing rapid changes in extent and habitat quality over geological history, today into the future. Climate sea level have drastically altered distribution since their appearance record ∼75 million years ago (Mya), through to Holocene. In contrast, contemporary dynamics driven primarily by anthropogenic threats, including pollution, overextraction, conversion aquaculture agriculture. Deforestation rates declined past decade, but future of mangroves is uncertain; new deforestation frontiers opening, particularly Southeast Asia West Africa, despite international conservation policies ambitious global targets for rehabilitation. addition, climatic processes such as sea-level rise that were important history will continue influence Recommendations given reframe conservation, with view improving state

Language: Английский

Citations

628
Blue carbon as a natural climate solution DOI
Peter I. Macreadie, Micheli Duarte de Paula Costa, Trisha B. Atwood

et al.

Nature Reviews Earth & Environment, Journal Year: 2021, Volume and Issue: 2(12), P. 826 - 839

Published: Nov. 1, 2021

Language: Английский

Citations

581
The Global Mangrove Watch—A New 2010 Global Baseline of Mangrove Extent DOI Creative Commons
Peter Bunting, Åke Rosenqvist, Richard Lucas

et al.

Remote Sensing, Journal Year: 2018, Volume and Issue: 10(10), P. 1669 - 1669

Published: Oct. 22, 2018

This study presents a new global baseline of mangrove extent for 2010 and has been released as the first output Global Mangrove Watch (GMW) initiative. is to apply globally consistent automated method mapping mangroves, identifying 137,600 km 2 . The overall accuracy was 94.0% with 99% likelihood that true value between 93.6–94.5%, using 53,878 points across 20 sites distributed globally. Using geographic regions Ramsar Convention on Wetlands, Asia highest proportion mangroves 38.7% total, while Latin America Caribbean have 20.3%, Africa 20.0%, Oceania 11.9%, North 8.4% European Overseas Territories 0.7%. methodology developed primarily based classification ALOS PALSAR Landsat sensor data, where habitat mask generated, within which undertaken Extremely Randomized Trees classifier. will also form basis monitoring system JAXA JERS-1 SAR, ALOS-2 PALSAR-2 radar data assess change from 1996 present. However, when product, users should note minimum unit 1 ha recommended error increases in disturbance narrow strips or smaller fragmented areas are Artefacts due cloud cover Landsat-7 SLC-off present some areas, particularly West lack Landsat-5 persistence cover. In future, consideration be given production 10 m Sentinel-2 composites.

Language: Английский

Citations

565
The direct drivers of recent global anthropogenic biodiversity loss DOI Creative Commons
Pedro Jaureguiberry, Nicolas Titeux, Martin Wiemers

et al.

Science Advances, Journal Year: 2022, Volume and Issue: 8(45)

Published: Nov. 9, 2022

Effective policies to halt biodiversity loss require knowing which anthropogenic drivers are the most important direct causes. Whereas previous knowledge has been limited in scope and rigor, here we statistically synthesize empirical comparisons of recent driver impacts found through a wide-ranging review. We show that land/sea use change dominant worldwide. Direct exploitation natural resources ranks second pollution third; climate invasive alien species have significantly less than top two drivers. The oceans, where dominate, different hierarchy from land fresh water. It also varies among types indicators. For example, is more community composition changes populations. Stopping global requires actions tackle all major their interactions, not some them isolation.

Language: Английский

Citations

461
UN Decade on Ecosystem Restoration 2021–2030—What Chance for Success in Restoring Coastal Ecosystems? DOI Creative Commons
Nathan J. Waltham, Michael Elliott, Shing Yip Lee

et al.

Frontiers in Marine Science, Journal Year: 2020, Volume and Issue: 7

Published: Feb. 20, 2020

OPINION article Front. Mar. Sci., 20 February 2020Sec. Marine Ecosystem Ecology Volume 7 - 2020 | https://doi.org/10.3389/fmars.2020.00071

Language: Английский

Citations

293
Land-Management Options for Greenhouse Gas Removal and Their Impacts on Ecosystem Services and the Sustainable Development Goals DOI Open Access
Pete Smith,

Justin Adams,

David J. Beerling

et al.

Annual Review of Environment and Resources, Journal Year: 2019, Volume and Issue: 44(1), P. 255 - 286

Published: June 11, 2019

Land-management options for greenhouse gas removal (GGR) include afforestation or reforestation (AR), wetland restoration, soil carbon sequestration (SCS), biochar, terrestrial enhanced weathering (TEW), and bioenergy with capture storage (BECCS). We assess the opportunities risks associated these through lens of their potential impacts on ecosystem services (Nature's Contributions to People; NCPs) United Nations Sustainable Development Goals (SDGs). find that all land-based GGR contribute positively at least some NCPs SDGs. Wetland restoration SCS almost exclusively deliver positive impacts. A few options, such as afforestation, BECCS, biochar potentially impact negatively SDGs, particularly when implemented scale, largely competition land. For those present are understood, more research is required, demonstration projects need proceed caution. low provide cobenefits, implementation can rapidly following no-regrets principles.

Language: Английский

Citations

287
Recirculating aquaculture systems (RAS): Environmental solution and climate change adaptation DOI
Nesar Ahmed, Giovanni M. Turchini

Journal of Cleaner Production, Journal Year: 2021, Volume and Issue: 297, P. 126604 - 126604

Published: March 3, 2021

Language: Английский

Citations

269
Global Mangrove Extent Change 1996–2020: Global Mangrove Watch Version 3.0 DOI Creative Commons
Peter Bunting, Åke Rosenqvist, Lammert Hilarides

et al.

Remote Sensing, Journal Year: 2022, Volume and Issue: 14(15), P. 3657 - 3657

Published: July 30, 2022

Mangroves are a globally important ecosystem that provides wide range of system services, such as carbon capture and storage, coastal protection fisheries enhancement. have significantly reduced in global extent over the last 50 years, primarily result deforestation caused by expansion agriculture aquaculture environments. However, limited number studies attempted to estimate changes mangrove extent, particularly into 1990s, despite much loss occurring pre-2000. This study has used L-band Synthetic Aperture Radar (SAR) mosaic datasets from Japan Aerospace Exploration Agency (JAXA) for 11 epochs 1996 2020 develop long-term time-series change. The map-to-image approach change detection where baseline map (GMW v2.5) was updated using thresholding contextual mask. applied between all image-date pairs producing 10 maps each epoch, which were summarised produce time-series. resulting had an estimated accuracy 87.4% (95th conf. int.: 86.2–88.6%), although accuracies individual gain classes lower at 58.1% (52.4–63.9%) 60.6% (56.1–64.8%), respectively. Sources error included misregistration SAR datasets, could only be partially corrected for, but also confusion fragmented areas mangroves, around ponds. Overall, 152,604 km2 (133,996–176,910) mangroves identified 1996, with this decreasing −5245 (−13,587–1444) total 147,359 (127,925–168,895) 2020, representing 3.4% 24-year time period. Global Mangrove Watch Version 3.0 represents most comprehensive record achieved date is expected support activities, including ongoing monitoring environment, defining assessments progress toward conservation targets, protected area planning risk ecosystems worldwide.

Language: Английский

Citations

253